#lightType:     0-null 1-turnLeft 2-turnRight 3-goStraight 4-turnRound 5-round
#lightColour:   0-red 1-yellow 2-green 3-unknown  Note:The color is unknown only when there are no traffic light.
#dueTime:       Duration of current traffic light colour.

uint8   lightType
uint8   lightColour
float32 dueTime